Difficulties with wearing a device? discussion

Hello everyone,

TLDR: I have a chastity belt on with an anal plug locked in place. It’s very comfortable, but sometimes when I’m relaxed enough to forget the device is there… suddenly my sphincter muscles contract involuntarily and give me a quick squeeze, like a tiny fist gripping my butt plug as if trying to pull it deeper inside. Then everything settles down… only for that sensation to return later at random intervals. Is this normal?

Long story: I’m using a Continuous-crotch male steel chastity wasiband belt with a small i-Bolt steel anal plug firmly secured on the secondary slot and locked-in. The anal plug is a compact i-Bolt “lollipop” metal butt plug featuring 4 graduated spherical balls along its shaft, which engage with a longitudinal track on the crotchband. This allows it to slide freely to accommodate changes in body posture. Once the belt is locked, the plug is pushed fully inside; the balls rest within the rectum while the anus naturally wraps around the thin shaft. The plug shifts forward and back but stays perfectly aligned with the opening, yet has ZERO vertical (up/down) movement—it can’t be pushed out or pulled in—so it remains non-removable as long as the belt is locked. VERY COMFORTABLE! The shaft measures 5/16” in diameter and extends 1 3/8” before reaching a 25mm ball, followed by balls of 22mm, 18mm, and finally a 15mm top one. The total length is just under 5” from the slot groove to the very tip. (Less than 4” actually inserts into the rectum). I barely feel it inside except for a slight pressure sensation. However, when I tug the shield sideways, I do notice its presence. It isn’t painful; it simply prevents movement. The plug is small and long enough that you can’t pull it out even if you slide the front shield aside somewhat, but not so long as to provide sexual gratification. Its diameter is large enough to interfere just right—you can’t get past it—but not so huge that it creates a full sensation. Basically, it’s precisely sized to be intensely frustrating if you try to work around it. Not painful at all, nor particularly gratifying. It’s simply…there. I can move or sit for the whole day with no major issues. There is low-level stimulation that feels “good,” but not enough to make me feel “horny” or cause leaking (though it can happen if I try). It’s good and very safe for public outings. Now seated, I don’t sense the plug itself… only a tiny pressure sensation from penetration while totally relaxed. However, occasionally I feel my anus “grabbing” at it, trying to suck it inward… (since it is secured on the crotchband, the plug won’t move). There are no other issues: no pain, discomfort, bleeding, or numbness. Very comfortable. While I don’t constantly feel the butt plug, I dislike having “reminders” in the form of random spasms… I just had another one a minute ago. And when it happens, I get a soft erection—not hard, but sufficient to fill the penis tube and create arousal. It’s not intense, yet still distracting… When I wear larger plugs that provide more stimulation, I don’t experience these random spasms.